If you happened to drive on London's perpetually congested A13 in late November, you may have noticed it: below a flyover, an eerily glowing orb surrounded by crowds of people who seemed to be crawling in and out of the strange erection. Read more >

The giant rainbow installation, shown above, adorns Amsterdam's Centraal station, and is more than just a pretty picture: the display is created using liquid crystal optics, showcasing novel ways of dispersing light.